<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <title>title</title>
    <script type="text/javascript" src="07.js"></script>
</head>

<body>
    <button onclick="alert('讨厌你点我干嘛');">点我一下</button>
    <a href="javascript:alert('让你点你就点');">你也点我一下</a>
</body>

</html>